<?php
include_once $_SERVER['DOCUMENT_ROOT'] . '/include/shared-manual.inc';
$TOC = array();
$TOC_DEPRECATED = array();
$PARENTS = array();
include_once dirname(__FILE__) ."/toc/ref.fann.inc";
$setup = array (
  'home' => 
  array (
    0 => 'index.php',
    1 => 'PHP Manual',
  ),
  'head' => 
  array (
    0 => 'UTF-8',
    1 => 'zh',
  ),
  'this' => 
  array (
    0 => 'function.fann-get-cascade-candidate-change-fraction.php',
    1 => 'fann_get_cascade_candidate_change_fraction',
    2 => '返回级联候选变化分数',
  ),
  'up' => 
  array (
    0 => 'ref.fann.php',
    1 => 'Fann 函数',
  ),
  'prev' => 
  array (
    0 => 'function.fann-get-cascade-activation-steepnesses-count.php',
    1 => 'fann_get_cascade_activation_steepnesses_count',
  ),
  'next' => 
  array (
    0 => 'function.fann-get-cascade-candidate-limit.php',
    1 => 'fann_get_cascade_candidate_limit',
  ),
  'alternatives' => 
  array (
  ),
  'source' => 
  array (
    'lang' => 'zh',
    'path' => 'reference/fann/functions/fann-get-cascade-candidate-change-fraction.xml',
  ),
  'history' => 
  array (
  ),
);
$setup["toc"] = $TOC;
$setup["toc_deprecated"] = $TOC_DEPRECATED;
$setup["parents"] = $PARENTS;
manual_setup($setup);

contributors($setup);

?>
<div id="function.fann-get-cascade-candidate-change-fraction" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">fann_get_cascade_candidate_change_fraction</h1>
  <p class="verinfo">(PECL fann &gt;= 1.0.0)</p><p class="refpurpose"><span class="refname">fann_get_cascade_candidate_change_fraction</span> &mdash; <span class="dc-title">返回级联候选变化分数</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.fann-get-cascade-candidate-change-fraction-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>fann_get_cascade_candidate_change_fraction</strong></span>(<span class="methodparam"><span class="type"><a href="language.types.resource.php" class="type resource">resource</a></span> <code class="parameter">$ann</code></span>): <span class="type"><a href="language.types.float.php" class="type float">float</a></span></div>

  <p class="para rdfs-comment">
   返回级联候选变化分数是一个介于0到1之间的数字。该数字决定了在训练候选神经元使用 <span class="function"><a href="function.fann-get-cascade-candidate-stagnation-epochs.php" class="function">fann_get_cascade_candidate_stagnation_epochs()</a></span> 函数时 <span class="function"><a href="function.fann-get-mse.php" class="function">fann_get_MSE()</a></span> 将会改变多大的分数,是为了不让这个训练停止。如果训练停止，候选神经元的训练将会被终止并且会选出最好的候选。
  </p>
  <p class="para">
   这意味在<span class="function"><a href="function.fann-get-cascade-candidate-stagnation-epochs.php" class="function">fann_get_cascade_candidate_stagnation_epochs()</a></span>期间如果 MSE 被<span class="function"><strong>fann_get_cascade_candidate_change_fraction()</strong></span>的分数更改，候选神经元的训练会因为训练的停滞而被停止。
  </p>
  <p class="para">
   如果级联候选变化分数很低，这个候选神经元将训练越多，如果这个分数很高则训练的越少。
  </p>
  <p class="para">
   默认的级联候选变化分数是 0.01, 等于 MSE 中1%的变化值。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.fann-get-cascade-candidate-change-fraction-parameters">
  <h3 class="title">参数</h3>
  <dl>
   
    <dt><code class="parameter">ann</code></dt>
    <dd>
     <p class="para">神经网络 <span class="type">资源</span>。</p>
    </dd>
   
  </dl>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.fann-get-cascade-candidate-change-fraction-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功，则返回级联候选变化分数，错误则返回 <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong> .
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.fann-get-cascade-candidate-change-fraction-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li><span class="function"><a href="function.fann-set-cascade-candidate-change-fraction.php" class="function" rel="rdfs-seeAlso">fann_set_cascade_candidate_change_fraction()</a> - 设置级联候选更改分数</span></li>
    <li><span class="function"><a href="function.fann-get-mse.php" class="function" rel="rdfs-seeAlso">fann_get_MSE()</a> - 从网络中读取均方误差。</span></li>
    <li><span class="function"><a href="function.fann-get-cascade-candidate-stagnation-epochs.php" class="function" rel="rdfs-seeAlso">fann_get_cascade_candidate_stagnation_epochs()</a> - 返回层叠候选停滞周期的数量</span></li>
   </ul>
  </p>
 </div>



</div><?php manual_footer($setup); ?>